Flowserve NRG211-1 Level Probe - Manual (Page 9)

9
Explanatory Notes
System description
The capacitance level probe NRG 211-1 serves as sensor for the level switch
NRS 2-4 (high level) / NRS 2-5 (low level) and can be used as part of a controlled
draining system in power stations or for low level detection in tanks.
Scope of supply
NRG 211-1
1 Level probe NRG 211-1
1 Gasket with serrated faces
1 Installation Instructions
Function
The electrode is designed as a rod-type capacitor, the capacitance of which is
electronically compared with a reference capacitance. The result is a level-
proportional measuring voltage. The fluid temperature is measured by an integral
resistance thermometer and electronically compared with a fixed limit. When the
two values are equal in magnitude the level-proportional measuring voltage will
be limited to 4 V.
Design
NRG 211-1
Design with welding standpipe for installation in vertical pipes.